CVE-2019-9821

MEDIUM

Description

A use-after-free vulnerability can occur in AssertWorkerThread due to a race condition with shared workers. This results in a potentially exploitable crash. This vulnerability affects Firefox < 67.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1539125

https://www.mozilla.org/security/advisories/mfsa2019-13/

Details

Source: MITRE

Published: 2019-07-23

Updated: 2019-07-26

Type: CWE-416

Risk Information

CVSS v2.0

Base Score: 6.8

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3.0

Base Score: 8.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 2.2

Severity: HIGH